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roll home screen performance tweaks to library screens

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cottongin 2026-01-24 04:14:19 -05:00
parent 7fce5b347d
commit c87a06edb8
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2 changed files with 49 additions and 7 deletions
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44
src/activities/home/MyLibraryActivity.cpp
View File

@ -13,6 +13,9 @@
#include "fontIds.h"
#include "util/StringUtils.h"
// Static thumbnail existence cache definition
ThumbExistsCache MyLibraryActivity::thumbExistsCache[MyLibraryActivity::MAX_THUMB_CACHE];
namespace {
// Layout constants
constexpr int TAB_BAR_Y = 15;
@ -510,15 +513,45 @@ void MyLibraryActivity::renderRecentTab() const {
const int y = CONTENT_START_Y + (i % pageItems) * RECENTS_LINE_HEIGHT;
const bool isSelected = (i == selectorIndex);
// Try to load and draw micro-thumbnail
const std::string microThumbPath = getMicroThumbPathForBook(book.path);
// Try to load and draw micro-thumbnail (with existence caching)
bool hasThumb = false;
if (!microThumbPath.empty() && SdMan.exists(microThumbPath.c_str())) {
// Check if we have cached existence info for this book
ThumbExistsCache* existsCache = nullptr;
std::string microThumbPath;
bool thumbExists = false;
bool existsCacheHit = false;
if (i < MAX_THUMB_CACHE) {
existsCache = &thumbExistsCache[i];
if (existsCache->checked && existsCache->bookPath == book.path) {
// Use cached existence info
existsCacheHit = true;
thumbExists = existsCache->exists;
microThumbPath = existsCache->thumbPath;
}
}
// If not cached, check existence and cache the result
if (!existsCacheHit) {
microThumbPath = getMicroThumbPathForBook(book.path);
thumbExists = !microThumbPath.empty() && SdMan.exists(microThumbPath.c_str());
// Cache the result
if (existsCache != nullptr) {
existsCache->bookPath = book.path;
existsCache->thumbPath = microThumbPath;
existsCache->exists = thumbExists;
existsCache->checked = true;
}
}
// Load and render thumbnail if it exists
if (thumbExists) {
FsFile thumbFile;
if (SdMan.openFileForRead("MYL", microThumbPath, thumbFile)) {
Bitmap bitmap(thumbFile);
if (bitmap.parseHeaders() == BmpReaderError::Ok) {
// Calculate actual drawn size (scaled to fit within max dimensions, preserving aspect ratio)
const int bmpW = bitmap.getWidth();
const int bmpH = bitmap.getHeight();
const float scaleX = static_cast<float>(MICRO_THUMB_WIDTH) / static_cast<float>(bmpW);
@ -527,10 +560,7 @@ void MyLibraryActivity::renderRecentTab() const {
const int drawnW = static_cast<int>(bmpW * scale);
const int drawnH = static_cast<int>(bmpH * scale);
// Center thumbnail vertically within the row using actual drawn height
const int thumbY = y + (RECENTS_LINE_HEIGHT - drawnH) / 2;
// When selected, clear only the actual drawn area to white first
// (drawBitmap1Bit only draws pixels, it doesn't clear, so we need the white background)
if (isSelected) {
renderer.fillRect(thumbX, thumbY, drawnW, drawnH, false);
}

12
src/activities/home/MyLibraryActivity.h
View File

@ -10,6 +10,14 @@
#include "../Activity.h"
#include "RecentBooksStore.h"
// Cached thumbnail existence info for Recent tab
struct ThumbExistsCache {
std::string bookPath; // Book path this cache entry belongs to
std::string thumbPath; // Path to micro-thumbnail (if exists)
bool checked = false; // Whether we've checked for this book
bool exists = false; // Whether thumbnail exists
};
class MyLibraryActivity final : public Activity {
public:
enum class Tab { Recent, Files };
@ -35,6 +43,10 @@ class MyLibraryActivity final : public Activity {
// Recent tab state
std::vector<RecentBook> recentBooks;
// Static thumbnail existence cache - persists across activity enter/exit
static constexpr int MAX_THUMB_CACHE = 10;
static ThumbExistsCache thumbExistsCache[MAX_THUMB_CACHE];
// Files tab state (from FileSelectionActivity)
std::string basepath = "/";
std::vector<std::string> files;